2024-02-25

Resiliency in ecology

  • Time required for an ecosystem to return to an equilibrium or steady-state following a perturbation (Holling 1973)
  • The capacity of a system to absorb disturbance and reorganize while undergoing change so as to still retain essentially the same function, structure, identity, and feedbacks

Resiliency

Example of nature based solutions

  • rewildling (NBS) vs enclousure

Rewildilng Mols Bjerge National Park (cont)

Higher genetic diversity higher resilience

  • 10 generations of populations with novel stressor
  • Different levels of genetic diversity
  • Higher diversity higher resilience (Ørsted et al. 2019)

Ecological Resilience at the Landscape Level:

  • Ecological resilience at the landscape level extends the concept of resilience to interactions and dynamics occurring across multiple ecosystems and habitats within a landscape.

  • Considers the interconnectedness of different ecosystems and their ability to collectively respond to disturbances.

  • Involves spatial heterogeneity and the distribution of resilience across landscapes.

  • Focuses on the dynamics of ecosystems in relation to each other and the overall landscape configuration.

On a landscape

All together

Higher connectivity leads to higher diversity

  • Habitat loss and fragmentation can have strong impacts on population size, genetic diversity and gene flow

(Amaral et al. 2021)

Connectivity vs Genetic diversity in europe

  • Three species of herbs through Europe (Naaf et al. 2021)
  • France, Belgium, Germany, Sweden, and Estonia

Current studies in Denmark

Grassland connectivity

Area vs diversity

References

Amaral, Tatiana Souza do, Juliana Silveira dos Santos, Fernanda Fraga Rosa, Marcelo Bruno Pessôa, Lázaro José Chaves, Milton Cezar Ribeiro, and Rosane Garcia Collevatti. 2021. “Agricultural Landscape Heterogeneity Matter: Responses of Neutral Genetic Diversity and Adaptive Traits in a Neotropical Savanna Tree.” Frontiers in Genetics 11 (February). https://doi.org/10.3389/fgene.2020.606222.

Holling, Crawford S. 1973. “Resilience and Stability of Ecological Systems.” Annual Review of Ecology and Systematics 4 (1): 1–23.

Naaf, Tobias, Jannis Till Feigs, Siyu Huang, Jörg Brunet, Sara AO Cousins, Guillaume Decocq, Pieter De Frenne, et al. 2021. “Sensitivity to Habitat Fragmentation Across European Landscapes in Three Temperate Forest Herbs.” Landscape Ecology 36: 2831–48.

Ørsted, Michael, Ary Anthony Hoffmann, Elsa Sverrisdóttir, Kåre Lehmann Nielsen, and Torsten Nygaard Kristensen. 2019. “Genomic Variation Predicts Adaptive Evolutionary Responses Better Than Population Bottleneck History.” Edited by Rodney Mauricio. PLOS Genetics 15 (6): e1008205. https://doi.org/10.1371/journal.pgen.1008205.